[FFmpeg-devel] [PATCH] qtrleenc autogop

[Michael Niedermayer]

On Tue, Jun 23, 2009 at 10:56:17AM -0700, Baptiste Coudurier wrote:
> Reimar D?ffinger wrote:
> > On Tue, Jun 23, 2009 at 02:16:24PM +0200, Michael Niedermayer wrote:
> >> On Tue, Jun 23, 2009 at 01:01:33PM +0200, Reimar D?ffinger wrote:
> >>> On Tue, Jun 23, 2009 at 12:51:44PM +0200, Michael Niedermayer wrote:
> >>>> On Mon, Jun 22, 2009 at 12:14:36PM -0700, Baptiste Coudurier wrote:
> >>>>> Michael Niedermayer wrote:
> >>>>>> On Sat, Jun 20, 2009 at 03:07:02PM -0700, Baptiste Coudurier wrote:
> >>>>>>> Hi guys,
> >>>>>>>
> >>>>>>> $subject. It should be more efficient,
> >>>>>> it breaks seeking if iam not misreading the patch, one can only seek to
> >>>>>> keyframes and the patch would stop keyframes from being used except for
> >>>>>> the very first frame
> >>>>> File works perfectly with quicktime player ;)
> >>>> quicktime can seek in files that have only a single keyframe by
> >>>> decoding all frames after the keyframe?
> >>> Yes, and it actually caches a few decoded frames AFAIK, so as long as
> >>> you seek only a little bit it seems okay.
> >> i guess that would make a nice feature request for ffplay ...
> > 
> > Well, but there might be some additional codec state, so you can't use
> > the frames alone to reset the codec to some earlier state.
> > I should probably get myself more informed before I make any statements,
> > but I think that caching is mostly to enable frame-stepping backwards.
> 
> Yes, even with one keyframe you can seek through the entire movie, it
> will read and decode to the frame requested. Like Reimar pointed, it
> might take a few minutes, but it should still work.
> 
> I think a gop 0 feature would be nice.

what do you mean by gop 0 ?

gop=0 means intra only (avcodec.h:
"the number of pictures in a group of pictures, or 0 for intra_only")

[...]

-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Republics decline into democracies and democracies degenerate into
despotisms. -- Aristotle
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